<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Untitled Page</title>
    <script type="text/javascript">
        function GetFrame() {
            var m = window.frmIn.contentWindow;
            alert(m);
        }
    </script>
</head>
<body>
    <iframe id="iframqq"  name="frmIn" src="http://www.freebuf.com" width="300"
        height="100"></iframe>
    <input type="button" value="btn" onclick="GetFrame()" />
</body>
</html>
